Results 71 to 80 of about 187,706 (222)

Formation of Secondary Structures Associated With the Gradient Drift Instability in the High‐Latitude Ionosphere

Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract The gradient drift instability (GDI) commonly occurs in the high‐latitude ionosphere and is widely recognized for producing elongated striation structures. While previous studies have established the linear growth and primary nonlinear development of striations, the formation of secondary structures remains not fully understood.
Yusha Tan, Jiuhou Lei, Maodong Yan
wiley   +1 more source

Power Spectra of Ionospheric Scintillations

Advanced Electromagnetics, 2017
Second order statistical moments of the phase fluctuationsare obtained taking into account the boundary condition,diffraction effects and polarization coefficients of theordinary and extraordinary waves. The variance and thecorrelation function are calculated for arbitrary 3D spectralfunction of electron density fluctuations containing bothanisotropic ...
Jandieri, George, Ishimaru, Akira, Rawat, Banmali, Kharshiladze, Oleg, Diasamidze, Zhuzhuna   +4 more
openaire   +4 more sources

Ionospheric scintillation intensity fading characteristics and GPS receiver tracking performance at low latitudes

GPS Solutions, 2019
Ionospheric scintillation refers to rapid fluctuations in signal amplitude/phase when radio signals propagate through irregularities in the ionosphere.
K. Guo, M. Aquino, S. Vadakke Veettil
semanticscholar   +1 more source

Ionosphere‐Thermosphere Coupling in the Northern Polar Region During the May 2024 Geomagnetic Superstorm

Journal of Geophysical Research: Space Physics, Volume 131, Issue 2, February 2026.
Abstract The May 2024 superstorm, as the most intense geomagnetic storm since 2003, caused a variety of disturbances in the magnetosphere‐ionosphere‐thermosphere system. This study investigates the long‐lasting electron density depletion in the polar region and the underlying ionosphere‐thermosphere coupling, based on a comprehensive set of ...
Lei Cai, Anita Aikio, G. P. Geethakumari, Heikki Vanhamäki, I. I. Virtanen, Shin‐ichiro Oyama, Yongliang Zhang, Jiaojiao Zhang, Marc Hairston   +8 more
wiley   +1 more source

Equatorial Ionospheric Scintillation During Daytime

Eos, 2018
Scintillation—flickers and distortions in radio waves passing through the ionosphere—can happen during daytime and at much lower dip latitudes than previously thought.
openaire   +1 more source

A Novel Deep Learning Approach for TEC Map Completion Using Image Equation‐Guided Loss

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 1, February 2026.
Abstract This study introduces the Image Equation Mechanism‐Completion Generative Adversarial Network (IEM‐CGAN), a groundbreaking deep learning framework that revolutionizes the reconstruction of large‐scale global ionospheric total electron content (TEC) maps.
Qingfeng Li, Hanxian Fang, Chao Xiao, Die Duan, Hongtao Huang, Ganming Ren, Xuhui Shen   +6 more
wiley   +1 more source

High‐Precision Prediction of Auroral Substorm Expansion Phase Evolution Using a Spatio‐Temporal Attention Deep Learning Model

Space Weather, Volume 24, Issue 2, February 2026.
Abstract Auroral substorms are a key manifestation of solar‐terrestrial interactions and the release of energy within the Earth's magnetosphere. The expansion phase, which is characterized by rapid changes in auroral morphology and intensity, poses significant space weather risks to satellite operations and communication systems.
Qiuju Yang, Xiaojian Cao, Yong Wang, Zanyang Xing   +3 more
wiley   +1 more source

L-band scintillations and calibrated total electron content gradients over Brazil during the last solar maximum

Journal of Space Weather and Space Climate, 2015
This work presents a contribution to the understanding of the ionospheric triggering of L-band scintillation in the region over São Paulo state in Brazil, under high solar activity.
Cesaroni Claudio, Spogli Luca, Alfonsi Lucilla, De Franceschi Giorgiana, Ciraolo Luigi, Galera Monico Joao Francisco, Scotto Carlo, Romano Vincenzo, Aquino Marcio, Bougard Bruno   +9 more
doaj   +1 more source

High‐Latitude Electrodynamics and Thermospheric Density Variations During the 2024 Gannon Storm

Space Weather, Volume 24, Issue 2, February 2026.
Abstract This study investigates high‐latitude electrodynamics and thermospheric density variations during the 2024 Gannon's storm. First, the auroral precipitation module of Auroral Spectra and High‐Latitude Electric field variabilitY, ASHLEY‐A, is improved to more accurately capture the location of auroral precipitation observed during this ...
Qingyu Zhu, Sarah Vines, Marc Hairston, Yun‐Ju Chen, Phillip Anderson, Cheng Sheng, Yue Deng   +6 more
wiley   +1 more source

Ionospheric scintillation modeling II. Theoretical study of power spectral densities of ionospheric scintillation

Journal of Space Weather and Space Climate
Anelectromagnetic signal that has passed through a layer of ionospheric irregularities can undergo significant modifications. The Power Spectral Density (PSD) of such a signal can then be rich in information about the medium through which it has passed.
Grégroy Morel, Vincent Fabbro, Olivier Boisot, Laurent Féral   +3 more
openaire   +1 more source